MGS #40: Rupelian, Mississippi

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Nuculanida - Yoldiidae
Yoldia clydoniona n. sp. Dockery 1982
37 individuals
C category
Bivalvia - Nuculida - Nuculidae
Brevinucula pseudopunctata Dockery 1982
30 individuals
C category
Nucula vicksburgensis Conrad 1848
1 individual
R category
Bivalvia - Poromyida - Verticordiidae
Haliris quadrangularis
7 individuals
R category
Verticordia dalliana
4 individuals
R category
Bivalvia - Pholadida - Corbulidae
Corbula rufaripa n. sp.
A category
100+ valves collected
Corbula engonata Conrad 1848
24 individuals
C category
Bivalvia - Cardiida - Semelidae
Abra pectorosa
3 individuals
R category
Bivalvia - Cardiida - Cardiidae
Agnocardia glebosum (Conrad 1848)
2 individuals
R category
Nemocardium eocenense (Meyer 1887)
12 individuals
C category
Bivalvia - Cardiida - Veneridae
Pitar aldrichi n. sp.
1 individual
R category
Bivalvia - Cardiida - Chamidae
Chama mississippiensis Conrad 1848
59 individuals
recombined as Chama (Psilopus) mississippiensis
C category
Bivalvia - Lucinida - Lucinidae
Myrtea scopularis (Casey 1903)
41 individuals
C category
Bivalvia - Carditida - Astartidae
Astarte triangulata Meyer 1886
A category
100+ valves collected
Bivalvia - Carditida - Carditidae
Venericardia carsonensis Dall 1903
8 individuals
recombined as Venericardia (Rotundicardia) carsonensis
R category
Bivalvia - Arcida - Arcidae
Barbatia paradiagona n. sp. Dockery 1982
5 individuals
R category
Scapharca invidiosa (Casey 1903)
A category
100+ valves collected
Bivalvia - Arcida - Glycymerididae
Glycymeris intercostata (Gabb 1860)
14 individuals
C category
Bivalvia - Pectinida - Plicatulidae
Plicatula variplicata n. sp. Dockery 1982
1 individual
R category
Bivalvia - Pectinida - Spondylidae
Spondylus dumosus (Morton 1834)
10 individuals
C category
Bivalvia - Pectinida - Pectinidae
Eburneopecten subminutus (Aldrich 1903)
73 individuals
recombined as Eburneopecten (Eburneopecten) subminutus
C category
Pecten perplanus Morton 1833
9 individuals
recombined as Pecten (Pecten) perplanus
R category
Bivalvia - Pectinida - Dimyidae
Dimya rufaripa Vokes 1979
A category
100+ valves collected
Bivalvia - Ostreida - Ostreidae
Lopha vicksburgensis (Conrad 1848)
46 individuals
C category
Bivalvia - Mytilida - Mytilidae
Septifer probolus n. sp.
7 individuals
R category [entered as Septifer probulus]
Gastropoda - Neogastropoda - Turridae
Pleurofusia clarkeana
MacNeil and Dockery 1984
Scobinella pluriplicata
MacNeil and Dockery 1984
Gastropoda - Neogastropoda - Clavatulidae
Turricula longiforma
MacNeil and Dockery 1984
Gastropoda - Neogastropoda - Fasciolariidae
Latirus aldrichi n. sp.
MacNeil and Dockery 1984
Gastropoda - Neogastropoda - Buccinidae
Metula fastidiosa
MacNeil and Dockery 1984
Gastropoda - Neogastropoda - Volutidae
Caricella reticulata
MacNeil and Dockery 1984
Caricella (Atraktus) reticulata
Dockery 1980
Lyria nestor
MacNeil and Dockery 1984
Gastropoda - Neogastropoda - Muricidae
? Urosalpinx aspinosus
MacNeil and Dockery 1984
Gastropoda - Neogastropoda - Mitridae
Mitra (Fusimitra) conquisita Conrad 1848
Dockery 1980
recombined as Fusimitra conquisita
Mitra conquista
MacNeil and Dockery 1984
Gastropoda - Neogastropoda - Costellariidae
Vexillum lintoidea
MacNeil and Dockery 1984
Orthosurcula longiforma
Dockery 1980
Gastropoda - Ranellidae
Sassia conradiana
MacNeil and Dockery 1984
Gastropoda - Cassidae
Mambrinia brevidentata
MacNeil and Dockery 1984
synonym of Galeodea
Sconsia prelintea n. sp.
MacNeil and Dockery 1984
Gastropoda - Ficidae
Ficus mississippiensis Conrad 1848
MacNeil and Dockery 1984
Gastropoda - Eocypraeidae
Sulcocypraea healeyi (Aldrich 1923)
MacNeil and Dockery 1984
Gastropoda - Epitoniidae
Confusiscala durhami n. sp.
MacNeil and Dockery 1984
Anthozoa - Scleractinia - Dendrophylliidae
Balanophyllia (Balanophyllia) elongata Vaughan 1900
Dockery 1980
see common names

Geography
Country:United States State/province:Mississippi County:Wayne
Coordinates: 31.7° North, 88.7° West (view map)
Paleocoordinates:31.9° North, 82.2° West
Basis of coordinate:based on political unit
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Oligocene
Stage:Rupelian 10 m.y. bin:Cenozoic 4
*Period:Early/Lower Tertiary *Epoch:Early/Lower Oligocene
*International age/stage:Early/Lower Rupelian - Early/Lower Rupelian
Key time interval:Rupelian
Age range of interval:33.90000 - 27.82000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Red Bluff
Stratigraphic resolution:formation
Stratigraphy comments: The Red Bluff Formation as exposed is Clarke and Wayne counties, Mississippi, consists of fossiliferous, dark clay,silty clay,with zones of ironstone concretions in the lower part. These sediments disconformably overlie the blue-gray, blocky, marine clay of the Shubuta Clay Member of the Yazoo Formation and were deposited during in shallow marine shelf, prodelta, and marginal delta bay enviroments. Along the Chickasawhay River in Wayne County, the lower portion of the Red Bluff Formation is very fossiliferous. Well-preserved fossils in this basal zone occur in abundance in narrow, glauconitic, sand lenses within the clay. Irregular ironstone concretions occur along fosiliferous zones in the lower Red Bluff Formation and show up on electric logs as one or two "kicks" on the resistivity curve at the base of the formation.
Lithology and environment
Primary lithology:gray poorly lithified silty,sandy siltstone
Secondary lithology: ironstone
Includes fossils?Y
Includes fossils?Y
Environment:offshore Tectonic setting:passive margin
Taphonomy
Modes of preservation:body,original aragonite,original calcite
Size of fossils:mesofossils
Collection methods and comments
Collection excludes:all microfossils,some macrofossils,difficult macrofossils
Collection methods:bulk,mechanical,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: bivalves only
Taxonomic list comments:Taxonomic list is recorded in catagories due to the fact that the author of this collection recorded all abundances of a species more than 100 as an "A",all other species with lesser numbers were documented as that number. This list has been catigorized as 1-9 valves found is an "R" as in rare, 10-99 valves found "C" common, and 100+ valves found is "A" for abundant, like the author had it.

Categories are listed in the comments field, absolute abundances are given in the abundance field.
Since taxa with greater than 99 specimens were not counted with absolute abundances, these were reported with category "A" for abundant.
Metadata
Database number:5787
Authorizer:L. Ivany, J. Sessa Enterer:S. DeLong, L. Eccles
Modifier:L. Eccles Research group:GCP,marine invertebrate
Created:1999-12-02 11:58:20 Last modified:2010-12-21 14:44:47
Access level:the public Released:1999-12-02 11:58:20
Creative Commons license:CC BY
Reference information

Primary reference:

323. D. T. Dockery. 1982. Lower Oligocene Bivalvia of the Vicksburg Group in Mississippi. Mississippi Department of Natural Resources Bureau of Geology 123:1-261 [L. Ivany/S. DeLong/M. Uhen]

Secondary references:

11842 D. T. Dockery. 1980. Invertebrate Macropaleontolgy of the Clarke County Mississippi Area. Bulletin - Mississippi Geological, Economic and Topographic Survey 122 [M. Kosnik/M. Kosnik/L. Eccles]
447 F. S. MacNeil and D. T. Dockery. 1984. Lower Oligocene Gastropoda, Scaphopoda, and Cephalopoda of the Vicksburg Group in Mississippi. Mississippi Department of Natural Resources, Bureau of Geology Bulletin 124:1-415 [L. Ivany/E. Kowalski/P. Wagner]